#include <cstdio>
#include <cstring>
using namespace std;

#define BUF_SIZE 1024

void FindVowels(const char[], char[]);

int main()
{
    char s1[BUF_SIZE], s2[BUF_SIZE];
    scanf(" %s", s1);
    FindVowels(s1, s2);
    printf("%s\n", s2);

    return 0;
}

void FindVowels(const char s1[], char s2[])
{
    int j = 0;
    for (int i = 0; i < (int)strlen(s1); i++) {
        switch (s1[i]) {
            case 'a':
            case 'i':
            case 'o':
            case 'e':
            case 'u':
                s2[j++] = s1[i];
                break;
        }
    }
    s2[j] = '\0';
}
